Netkiller NoSQL 手札

MongoDB, Cassandra, Redis, CouchBase, Hypertable...

Mr. Neo Chan, 陈景峰(BG7NYT)

中国广东省深圳市龙华新区民治街道溪山美地

518131

+86 13113668890

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文档始创于2012-11-16

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2.3. Replication

很多教程上面采用手工配置主从复制，我不建议你这样启动，请采用修改/etc/mongod.conf配置文件的方案。

创建主：mongod –port 27017 –dbpath /var/lib/mongodb –master 创建从：mongod –port 27017 –dbpath /var/lib/mongodb –slave –source master_ip_address:27017

2.3.1. Master

sed -i "s/#master = true/master = true/" /etc/mongod.confsystemctl restart  mongod

2.3.2. Slave

sed -i "s/#slave = true/slave = true/" /etc/mongod.confsed -i "s/#source = arg/source = mongodb.master.example.com/" /etc/mongod.confsystemctl restart  mongod

2.3.3. 测试

进入 Master

[root@localhost ~]# mongoMongoDB shell version: 2.6.11connecting to: testWelcome to the MongoDB shell.For interactive help, type "help".For more comprehensive documentation, see	http://docs.mongodb.org/Questions? Try the support group	http://groups.google.com/group/mongodb-userServer has startup warnings:2015-11-14T15:51:21.215+0800 [initandlisten]2015-11-14T15:51:21.215+0800 [initandlisten] ** WARNING: Readahead for /var/lib/mongodb is set to 4096KB2015-11-14T15:51:21.215+0800 [initandlisten] **          We suggest setting it to 256KB (512 sectors) or less2015-11-14T15:51:21.215+0800 [initandlisten] **          http://dochub.mongodb.org/core/readahead>>> db.foo.save({'name':'neo','address':{'city':'shenzhen','post':518000},'phone':[13113668890,13322993040]})WriteResult({ "nInserted" : 1 })> db.foo.find();{ "_id" : ObjectId("5646e881a11081d5998bf70c"), "name" : "neo", "address" : { "city" : "shenzhen", "post" : 518000 }, "phone" : [ 13113668890, 13322993040 ] }>

进入 Slave

[root@localhost ~]# mongoMongoDB shell version: 2.6.11connecting to: testWelcome to the MongoDB shell.For interactive help, type "help".For more comprehensive documentation, see	http://docs.mongodb.org/Questions? Try the support group	http://groups.google.com/group/mongodb-userServer has startup warnings:2015-11-14T15:51:23.668+0800 [initandlisten]2015-11-14T15:51:23.668+0800 [initandlisten] ** WARNING: Readahead for /var/lib/mongodb is set to 4096KB2015-11-14T15:51:23.668+0800 [initandlisten] **          We suggest setting it to 256KB (512 sectors) or less2015-11-14T15:51:23.668+0800 [initandlisten] **          http://dochub.mongodb.org/core/readahead> db.foo.find();{ "_id" : ObjectId("5646e881a11081d5998bf70c"), "name" : "neo", "address" : { "city" : "shenzhen", "post" : 518000 }, "phone" : [ 13113668890, 13322993040 ] }>